.material-list{
  display: flex;
  flex-wrap: wrap;
  margin-left: 10px;
}
.material-item{
  border: 1px solid #eee;
  margin-right: 10px;
  border-radius: 5px;
  padding: 10px;
  width: 120px;
  height: 80px;
  margin-bottom: 10px;
  background-size:cover;
 cursor: move;
  // background-repeat: no-repeat;
  background-position: center;
}
.material-item:hover{
  border: 1px solid blue;
}